Lamp



July 10, 1928.

- C. E. SCHMUNK LAMP Filed Dec. 6, 1921 g; 5 INVENTOR Patented July 10, 1928.

' entree stares team earner es area.

CHARLES E. SCHMUNK, OF GRAFTON, PENNSYLVANIA.

LAMP.

' Application fi1ed December 6, 1921. Serial No. 520,277.

This invention is for an improvement in lamps, and relates particularly to oil burning lamps of the type in which the body or font is formed of glass.

Glass lamps of this kind are generally provided with a sheet metal bushlng or co1- lar, brass generally being employed, set lnto theopening at'the top thereof into which the burner'is screwed. Considerable dimculty has heretofore been met with in positively securing the collars in the openings so that they will not eventually work loose and rotate with the co-operating part of the burner, or pull out with the burner. Furthermore, the collars heretofore con'nnonly used may easily become bent during their insertion into the lamp.

The present invention relates to an improved collar and method of. applymg the .same, and has for its. object to provide a collar which will be more permanently secured to the lamp, and which will not be easily deformed or bent.

A further object is to provide an improved base for lamps of this kind having an annular trough at the bottom thereof which serves to support the lamp in inverted position during the process of manufacture, and which, in use, catches the small quantities of oil which are spilled from time to time over the sides of the lamp, thereby preventing the oil from getting on and seeping over the supporting structure on which the lamp is set.

My invention may be readily understood by reference to the accompanying drawings, in which:

Fig. 1 is a side view, partly in section and partly in elevation, of a lamp embodying 4!; my invention;

Fig. 2 is atop view of the collar; and

Fig. 3 is a perspective view of a modified form of collar.

In the drawings, the part of the lamp shown, with the exception. of the collar hereinafter described, is formed of glass. It is provided with a base 5 preferably having an ornamental shape. on the lower end or foot portion 6 of which is formed an annular trough 7. This trough extends outwardly beyond the base and is formed between the outside of the base and the annular, integral flange 8.

The upper part of the base tapers into a central column or pedestal portion 9. On

the upper end of the column is an integral font or reservoir portion 10. The part 10 is preferably made by ablowing operation in a mold, so that the interior thereof is hollow.

On the upper end of the container 10' is a neck portion 11 through which is a central aperture 12. In the central aperture is a collar 13, preferably made of thin spun brass, having a threaded interior.- At the top of the collar is an integral flat radial flange 14;, on the periphery of which is an inwardly curled depending edge 15. A bead 16 formed on the top of the neck of the lamp extends into the curled edge, and thereby prevents the collar from pulling out and from rotating relatively thereto.

In practice, the collars are spun to the shape that is shown. During the forming of the container portion 10 and neck 11 in a blowing mold, one of'the collars is inserted in proper position in the mold. The plastic glass is then forced and molded around the collar. Some of the glass flows under the curled edge 15 to form bead 16. The collar is'thus immovably set into the lamp, while the glass is plastic, a part of the edge preferably being embedded in the glass to a slight extent. The flange is not embedded to such an extent, however, as to cause inj urious effect when the collars become heated. The flange and curled bead strengthen the collar so that it will not easily bend out of shape. Furthermore, the edge, being on the outside of the neck portion, instead of being embedded entirely in the glass, can be clamped by the sectional mold generally employed in forming the lamp, so that it can be accurately positioned and will not be heated by the molten glass and subjected to pressure in such manner as to cause defor mation thereof. i

The collar is designed to cooperate with a threaded extension on a lamp burner to provide means for detachably connecting the burner and lamp. The burner in this type of lamp is generally removed for filling the lamp. as well as for inserting wicks and cleaning the lamp, so that it is important that the collar be fixed against removal with the removal of the burner, and it must be fixed so as to hold against such removal for a long period of time. Once the collar becomes loose and removable, the lamp becomes unsafe.

Inasmuch as the collar is formedof very thin, spun metal, the threads, which are spun in the collar, are on the outside as Well as the inside. The glass flows in around this outside thread to assist in holding the collar against rotation.

The base'of the lamp is the first part I which is formed during the making of the lamp. The first operation is a molding operation. After the base is formed, the lamp must he held in inverted position to effect the other operations. The flanged or trough'ed portion on the base provides means for suspendingand holding the lamp in invertcd position.

In the modification shown in Fig. 3, the collar 18, instead of having a curled edge around the peripheryof flange 14:, has a substantially vertical flange 18 Which is milled o'r serrated or corrugated, or otherwise irregularly shaped, and the glass flows into the corrugations into a corresponding irregular shape to interlock With and hold the collar from Working loose.

Various changes may be made in the in vention Within the scope of the appended claims, and I do not limit myself to the shape of the lamp as shown.

lVhat I claim is: I

l. A glass lamp having a-container, a neck portion therefor, said neck portion having a burner receiving opening therethrough, a collar in the burner opening, a flange on the upper end of the collar, an inwardly curled edge on the flange, and an integral bead on the neck extending into the curled flange and interlocking therewith to hold the collar in the burner opening, the curled edge of the collar being of less depth than the collar.

2. A lamp including a glass container having a neck at the top thereof, a threaded sleeve in the neck having a flange extending over the top of the neck and turned down the outside thereof, the lowermost edge of the flange curling inwardly and being frozen into the glass.

3. A glass lamp having a'reservoir hav-' ing a neck therein, and a burner attaching collar in the neck formed of an integral piece of metal, the collar being threaded and having a turned down flange at the top thereof of less Width than the depth of the collar extending over the-top of the neck, said flange having holding means therein, the glass of the neck being flowed into interlockin engagment With the holding means,

whereby the collar is secured in place.

. In testimony whereof I affix my signature.

CHARLES E. SCHMUNK. 

